西南交通大学学报

On New Generation Traction Power Supply System and Its Key Technologies for Electrification Railway

LI Qunzhan

2014, 27(4): 559-568. doi: 10.3969/j.issn.0258-2724.2014.04.001

[Abstract](1446)

Abstract:
Unlike the traditional traction power supply system which enables the electrified railway traction substation to be connected to power grid in a way of phase rotation, a new generation traction power supply system without phase splits in power grid was proposed. Three key technologies of this system...

Dynamic Compensation Strategy of Inductive Power Transfer System with Inductive-Resistive Load

HE Zhengyou, LI Yong, MAI Ruikun, LI Yanling

2014, 27(4): 569-575,589. doi: 10.3969/j.issn.0258-2724.2014.04.002

[Abstract](1116)

Abstract:
The equivalent inductive impedance of the rectifier load will lead to a detuned IPT(Inductive Power Transfer) system. In order to maintain resonance frequency, a dynamic compensation scheme was proposed. This scheme utilizes short-time Fourier transformation to obtain the current and voltage phasors...

Design of Balance Traction Transformer Capacity in Co-phase Traction Power Supply System

XIE Shaofeng, LI Qunzhan

2014, 27(4): 576-581. doi: 10.3969/j.issn.0258-2724.2014.04.003

[Abstract](1063)

Abstract:
To provide a theoretical foundation for selecting traction transformer capacity in co-phase traction power supply system, the difference between the feeder current of the co-phase traction power supply system and existing traction power supply system was analyzed. The design methods of traction tran...

Harmonic Resonance of AT Power Supply System of High Speed Railway Based on Train-Network Coupling

HAN Xudong, WANG Bin, GAO Shibin, CHEN Minwu

2014, 27(4): 582-589. doi: 10.3969/j.issn.0258-2724.2014.04.004

[Abstract](1378)

Abstract:
To study the harmonic resonance caused by the electrical coupling between high speed train and AT power supply system, a mathematic model of AT power supply system of high speed railway based on nodal admittance equation and a harmonic model of high speed train based on the power source characterist...

Acquisition of Part-Whole Relations Based on Unsupervised Learning

JIA Zhen, HE Dake, YIN Hongfeng, LI Tianrui

2014, 27(4): 590-596. doi: 10.3969/j.issn.0258-2724.2014.04.005

[Abstract](987)

Abstract:
An unsupervised learning method was proposed to solve the problem of part-whole relation extraction from Chinese free texts. A subsequence extraction algorithm was firstly introduced that can acquire concept pairs and their context patterns from domain texts, and a distributional semantic model was ...

Hyperspectral Sparse Unmixing via Adaptive Overcomplete Dictionary Learning

WANG Rui, LI Hengchao, YIN Zhongke

2014, 27(4): 597-604. doi: 10.3969/j.issn.0258-2724.2014.04.006

[Abstract](1287)

Abstract:
In the linear sparse unmixing model of hyperspectral data, large estimation error of the fractional abundances of endmembers in each mixed pixel may be caused by the incorrect identification of endmembers. A novel sparse unmixing algorithm was proposed based on adaptive overcomplete dictionary. Firs...

Load-Bearing Mechanism and Yield Load of PBL Shear Connectors

ZHAO Canhui, XIA Song, LI Qiao

2014, 27(4): 605-611. doi: 10.3969/j.issn.0258-2724.2014.04.007

[Abstract](888)

Abstract:
In order to study the deformability of Perfobond Leiste (PBL) shear connectors, a series of tests were conducted to investigate the load-bearing mechanism and deformability influence factors of PBL shear connectors. In these tests, 33 specimens divided into 4 types and 9 groups were loaded, and the ...

Measurement and Theoretical Analysis of Vehicle-Induced Vibration on Elevated Railway Station

LI Xiaozhen, LIU Quanmin, ZHANG Xun, ZHANG Zhijun

2014, 27(4): 612-618. doi: 10.3969/j.issn.0258-2724.2014.04.008

[Abstract](1067)

Abstract:
In order to study the environmental vibration in different regions of elevated stations, measuring points for measuring the vibration in three directions (x, y, and z) were deployed to the mid-span of track beam, office, and waiting room of an elevated station in a passenger dedicated railway. When ...

Numerical Simulation Analysis of Steel-Concrete Joint Section in Hybrid Girder of Cable-Stayed Bridge

ZHANG Jingfeng, LI Xiaozhen, XIAO Lin, BAO Yuwen

2014, 27(4): 619-625,699. doi: 10.3969/j.issn.0258-2724.2014.04.009

[Abstract](1226)

Abstract:
To investigate the mechanical behavior of steel-concrete joint section of cable-stayed bridge, ANSYS, a general finite element package, was used to analyze the nonlinear numerical simulation of the joint section mechanics behavior of Wusu bridge in Heixiazi Island. In the analysis, the nonlinear cha...

Long-Term Random Deflection of Eccentrically Loaded RC Column

XU Tengfei, XIANG Tianyu, ZHAO Renda

2014, 27(4): 626-630. doi: 10.3969/j.issn.0258-2724.2014.04.010

[Abstract](1048)

Abstract:
Owing to the randomness of shrinkage and creep of concrete, random analysis method should be adopted to provide probabilistic guarantee for the analysis of concrete long-term random deflection. Stochastic variables for the long-term analysis with GL2000 model about creep and shrinkage of concrete we...

Transfer Matrix Method of Beam-Column Transient Analysis Considering Second-Order Effect

SHAO Junhu, XIANG Tianyu, ZHAO Renda

2014, 27(4): 631-636. doi: 10.3969/j.issn.0258-2724.2014.04.011

[Abstract](955)

Abstract:
Second-order effect of a compression-bending member under a high axial force will influence the stiffness and dynamic characteristics of a structure, so a transfer matrix method was proposed to calculate the transient response of beam-column with considering the second-order effect. With this method...

Static Mechanics Impact Analysis of Newly-Built Tunnel beneath Existing Tunnel Based on Extenics Theory

LENG Biao, QIU Wenge, GONG Lun

2014, 27(4): 637-641. doi: 10.3969/j.issn.0258-2724.2014.04.012

[Abstract](917)

Abstract:
In order to discuss the static mechanics impact degree of a newly-built below-crossing tunnel on an existing tunnel, the extenics matter-element theory was applied. An evaluating model about the static mechanics impact degree was established by considering the relationship between the newly-built tu...

Vortex-Induced Fatigue Damage Analysis of Submerged Floating Tunnel Cable

LUO Gang, ZHOU Xiaojun

2014, 27(4): 642-648. doi: 10.3969/j.issn.0258-2724.2014.04.013

[Abstract](1034)

Abstract:
In order to assess the vortex-induced fatigue damage on cables of submerged floating tunnel, the Blevins lift model and Vengugopal drag model were introduced to calculate the lift coefficient and dimensionless amplitude by modal superposition method, taking into account the influence of the addition...

Adaptability of Continuous Welded Rail of Unit Slab Non-ballast Track on Bridges

XIE Kaize, WANG Ping, XU Jingmang, XU Hao

2014, 27(4): 649-655. doi: 10.3969/j.issn.0258-2724.2014.04.014

[Abstract](956)

Abstract:
To investigate the reasonable limit value of the distance between two fixed bearings of a continuous beam bridge on which unit slab non-ballast track was layed, a rail-slab-bridge-pier integrated model was established by the finite element method. In conditions of different rail temperatures, the in...

Optimization Algorithm for Horizontal Realignment Based on Coordinate of Metro Centerline

SONG Zhanfeng, PENG Xin, WU Qinghua

2014, 27(4): 656-661. doi: 10.3969/j.issn.0258-2724.2014.04.015

[Abstract](925)

Abstract:
Alignment parameters were estimated and optimized to deal with the subway beyond-limit problem based on the coordinates of tunnelling centerline. Based on the coordinate of metro centerline, the capability of dealing with complicated beyond-limit situations can be enhanced greatly by estimating and ...

Limit Equilibrium Method of Slope Stability Analysis Considering Spatial Variability of Soil Properties

BAI Tao, HUANG Xiaoming

2014, 27(4): 662-667. doi: 10.3969/j.issn.0258-2724.2014.04.016

[Abstract](1028)

Abstract:
In order to evaluate the adaptability of the limit equilibrium method (LEM) to assess the stability of spatially variable soil slope, stability analysis of slope sections was conducted using the LEM (limit equilibrium method) considering the spatial variability of soil property. The Karhunen-Loève (...

Self-Organized Criticality in Process of Aftershocks of Lushan Earthquake

LIU Chunqiong, SHI Kai, LI Sichuan

2014, 27(4): 668-674. doi: 10.3969/j.issn.0258-2724.2014.04.017

[Abstract](925)

Abstract:
The statistical relations of aftershocks following a strong earthquake can give useful information on the dynamical features of seismic processes and the involved geodynamical mechanisms. The sequence of aftershocks of the Lushan Ms7.0 earthquake, occurred on the Longmenshan tectonic zone in Sichuan...

Mechanical Responses of Pavement under Aircrafts with Different Main Landing Gears

ZHANG Xianmin, DONG Qian, LÜ, Yaozhi

2014, 27(4): 675-681. doi: 10.3969/j.issn.0258-2724.2014.04.018

[Abstract](1143)

Abstract:
In order to provide a theoretical basis for the optimal design of aircraft and pavement, a finite element model of runway was established based on the elastic layered theory to analyze the mechanical responses caused by changing main landing gears. Two sets of aircrafts with the same loads level but...

Numerical Analysis of Dynamic Strain and Fatigue Characteristics of Asphalt Layer Considering Interlayer Condition

HUANG Bing, AI Changfa, YANG Enhui, CHENG Meng

2014, 27(4): 682-686. doi: 10.3969/j.issn.0258-2724.2014.04.019

[Abstract](861)

Abstract:
In order to determine the relationship between the fatigue life of asphalt layer and its influencing factors such as interlayer contact state, temperature, and axle load, a numerical calculation model of asphalt pavement was built based on the interlayer conditions by using the ABAQUS software. Thro...

Evaluation of Asphalt Concrete Pavement Based on Passenger Ride Comfort Level

WANG Feng, ZHANG Jinxi

2014, 27(4): 687-692. doi: 10.3969/j.issn.0258-2724.2014.04.020

[Abstract](905)

Abstract:
In order to provide a theoretical basis for the ride comfort level evaluation, daily management, and maintenance of asphalt concrete pavement, the performance parameters and three-directional acceleration data of highway pavements were measured indoors and outdoors. Using these data, the relationshi...

Coupled Vibration Characteristics of Flexible Car Body and Equipment of EMU

SHI Huailong, WU Pingbo, LUO Ren

2014, 27(4): 693-699. doi: 10.3969/j.issn.0258-2724.2014.04.021

[Abstract](978)

Abstract:
To study the coupled vibration between a flexible car body and its suspended equipment, a rigid-flexible coupling dynamic model of high-speed electric multiple units (EMUs) was established taking into account the flexible modes of the car body. The swept frequency excitation method was used to analy...

Analysis of Wheel/Rail Impact Induced by Wheel Flats

WANG Yijia, ZENG Jing, GAO hao, LUO Ren

2014, 27(4): 700-705. doi: 10.3969/j.issn.0258-2724.2014.04.022

[Abstract](978)

Abstract:
In order to study the dynamic issues induced by wheel flats for high speed trains, a dynamic model and new/worn wheel flat models were developed using the multi-body theory and the equivalent track excitation method. The simulation method considering the change of wheel radius was applied to simulat...

Algorithm for Detecting Modular Structures and Diagnosing Hub Sections in Urban Road Network

HU Yucong, CHEN Haiwei

2014, 27(4): 706-711. doi: 10.3969/j.issn.0258-2724.2014.04.023

[Abstract](906)

Abstract:
In order to detect the complexities of topology and discover the key road sections in urban road network, the clustering feature of urban road network was analyzed by modular structure theory, and a GN-T algorithm was proposed for dividing the modular structures and diagnosing hub sections in the ur...

Model and Approximation Algorithm for Dynamic Wagon-Flow Allocation Based on Greedy Strategy

GUO Rui, GUO Jin, SU Yuebin, MA Liang

2014, 27(4): 712-719. doi: 10.3969/j.issn.0258-2724.2014.04.024

[Abstract](1030)

Abstract:
To develop a method for the intelligent generation of dynamic wagon-flow allocation, which can search and solve efficiently and timely perform adjustment, the multi-stage decision model was built based on greedy algorithm. By dividing the decision process into several stages of the marshaling sequen...

Evaluating Performance of Non-intrusive Indicators on Drowsy Driving Detection

XU Chuan, WANG Xuesong, CHEN Xiaohong

2014, 27(4): 720-726. doi: 10.3969/j.issn.0258-2724.2014.04.025

[Abstract](1032)

Abstract:
To detect the drowsiness state of the driver more accurately, a high-fidelity driving simulator was adopted to collect the driving behavior and eye movement data of drivers, and questionnaires were used to collect their subjective sleepiness scales. Based on these data, 23 non-intrusive indicators w...

Airline Fleet Robust Optimization Approach under Stochastic Demand with Route Network Effects

WANG Yu, ZHU Jinfu, GE Wei

2014, 27(4): 727-733. doi: 10.3969/j.issn.0258-2724.2014.04.026

[Abstract](995)

Abstract:
In order to solve the problem of network effects under uncertain passenger demand in route network, the itinerary-based optimization model for passenger-mix problem was incorporated into airline fleet planning problem. According to the optimization method for fleet capacity allocation, the number of...

Real-Time Adjustment Strategy of Aircraft Taxiing Routes for A-SMGCS

TANG Yong, HU Minghua, HUANG Rongshun, LIU Weidong, WU Honggang, ZHU Xinping, XU Zili

2014, 27(4): 734-740. doi: 10.3969/j.issn.0258-2724.2014.04.027

[Abstract](917)

Abstract:
Adjustment of airport taxiing routes in operation phase of aircrafts needs a large amount of calculation, which makes it difficult to meet the real-time requirements for A-SMGCS (advanced surface movement guidance and control system). In order to resolve this problem, a colored taxiway-oriented Petr...

Bifurcation Control of Mechanical System with Periodic Coefficients

ZHENG Xiaowu, XIE Jianhua

2014, 27(4): 741-745. doi: 10.3969/j.issn.0258-2724.2014.04.028

[Abstract](782)

Abstract:
In order to control the bifurcation behavior at the equilibrium point of the differential system with periodic coefficients losing its stability, the methods for bifurcation control for the dynamical system with constant coefficients, such as using the linear controller, parameter method, and transl...

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2014 Vol. 27, No. 4